Re: Clean Object Class Design -- Circle/Ellipse

> With the database industry rapidly degenerating toward navigational
> databases, I think Date is as relevant and important today as he has ever
> been.
>

OK. Here you've said something I can agree with. In fact, I think it gets even worse.

I think a lot of people use foreign keys as if they were nothing more than pointers, except slower
than physical pointers because they go through an addition layer of indirection, namely an index.

In other words, they navigate relational databases precisely as if they were not relational at all. Then they complain because they don't run as fast as network or hierarchical databases. Yeah, right.

This, I believe, is relevant to the earlier exchange between you and Carl about whether the relational model was or was not relevant in the case of storing and accessing persistent objects. I'm fully aware that there were a lot of other issues going on as well, but I think this is one reason why the two of you never directly connected in your discussions.

--
Regards,
    David Cressey
    www.dcressey.com